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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 1953 Tumbes earthquake ： ウィキペディア英語版 1953 Tumbes earthquake The 1953 Tumbes earthquake occurred on December 12 at near the border between Peru and Ecuador. The shock had a moment magnitude of 7.5, a maximum Mercalli Intensity of VIII (''Severe''), and occurred in the northwestern offshore area of Tumbes, Peru. == Geology == The North Andean convergent margin is a region of large crustal deformation. The North Andes block moves northeastwards relative to the South America at a rate of 6±2 mm/yr. The Nazca Plate is subducting beneath the South American Plate along the Colombia-Ecuador Trench. The subduction of the Carnegie Ridge into the Colombia-Ecuador Trench affected the crustal deformation in this region and the coupling between the Nazca Plate and the South America Plate. In addition, the subduction of the Carnegie Ridge may be an important drive contributing to the relatively northeastward movement of the North Andes block. Although there was no large earthquakes in the Gulf of Guayaquil segment of the subduction zone in the late 20th century, the strong earthquakes in 1953 and 1959 suggested that this was because of the strong coupling rather than being aseismic, and the seismic coupling may be quite high and be able to produce large earthquakes.〔"Tectonic segmentation of the North Andean margin: impact of the Carnegie Ridge collision" by M. -A. Gutscher, J. Malavieille, S. Lallemand, and J. -Y. Collot〕〔Egbue, O., Kellogg, J., Pleistocene to Present North Andean escape, Tectonophysics (2010), doi 10.1016/j.tecto.2010.04.021〕 Besides subduction, other activities also played important roles in this region. A strike-slip fault known as the Dolores-Guayaquil megashear runs from the trench and goes inland. The Gulf of Guayaquil formed as a result of movement on the Dolores-Guayaquil megashear.〔http://geoscience.unlv.edu/Fildani_et_al.PDF〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1953 Tumbes earthquake」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.